Last question, yes.
So after
reading watching
(Yes, that was intentional) Hyouka ep 4, I thought of a few things that may seem a bit mysteriously overthrown in the temporary Oreki theory.
Remember that Oreki DID not propose a theory, instead, he proposed a conclusion. But in reality, that conclusion did not account to (quoted from thundrakkon) "Hyouka", her uncle's character, and sacrifices. It also didn't account for what her uncle had to gave up.
By theory, Chitanda's uncle got expelled from school in a silent matter, so to say. People called him hero. However, judging by Oreki's actions, he either forgot or intentionally withhold a vital information: if the school expelled Jun after 4 months to avoid further angering the student body, then why is Jun being remembered still by the members of the Classics Club and the (whatever org was that) thing... Why was Oreki's sister pushing to keep the Classics Club alive? Does Oreki's sister know something, being a former Classics Club member? Did she saw Hyouka vol. 1? Why did Chitanda cry? If Jun was famous enough, then his explusion would have erupted a new defiance from the students....
... so what was the trigger?
me thinks it's this....
Spoiler for The reason Chitanda cried was....:
...
...
because his Uncle was expelled and put to shame through a highly embarrassing event.
If there was no violence, then the school council would have NO reason to expel him in the first place. So why would he be expelled? The key is in the reference "niece of time". Remember when I said that the niece of time had something to do with the daughter of time, somehow. Somehow, it can all connect. 45 years ago, a silent scandal broke out over the entire school, somehow insinuated by the school council. This scandal earned him an expulsion, and thus breaking Chitanda family's reputation. By manipulating "history", the school can have a chance to expel a famous student by making him infamous, without any worry of further anger. This also explains why there are so few records of it 45 years ago, because many students were torn by the scandal. Many (at the time) still thought of him as a hero.
So...to preserve the family's reputation, Chitanda's uncle had to dissappear.
Well, that's my theory.
Also, Hyouka is officially....intriguing.